8.2.1 Maximum ignition trials error
Maximum Ignition Trials Error
Issue Diagnosis Fix
Error – Ignition
Failure after 3
tries boiler has
failed to ignite
on 3 successive
attempts. Boiler
is in lockout for
1 hour, then
repeats 3-try
sequence.
Consult service
technician if
error recurs.
No spark when igniting.
Ignition probe/flame
sensor disconnected.
Check that ignition lead is secure at the control
module and at the probe.
Manual gas shutoff is
closed or gas line not
fully purged.
Check for gas flow. Open manual gas shutoff
and reset boiler.
Gap between ignition
probe rods is too large
or too small.
Adjust ignition probe rod gap between ⅛ and
3/16th (3.2-4.7 mm).
Boiler ignites, but shuts
off at the end of the
ignition trial. Improperly
grounded pressure
vessel/burner or
unserviceable ignition
lead or spark module.
Ensure the pressure vessel is grounded. Check
the ignition probe/flame sensor is electrically
isolated from the vessel, and its ceramic
insulator is intact. Replace ignition lead Replace
spark module.
8.2.2 Hi Limit cut-off temperature error
Hi Limit cutoff temperature Error
Issue Diagnosis Fix
Error – Water High-
Limit Exceeded
Water temperature exceeds hi-
limit. Boiler is in hard lockout
mode.
See Resetting a boiler after a hi-
limit temperature lockout on page
107.
8.2.3 Low Water Cut-off error
Low Water Cutoff Error
Issue Diagnosis Fix
Error - Low Water
Cutoff
The Safety and Ignition module
has detected a low water
condition.
See Resetting a boiler after a
LWCO lockout on page 106.
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